PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/07-16:12:30
G07     353.3          63.7                9.9 +/-    0.87      10.9 +/-    0.87  0.080 / 0.160
G08     90.6           52.3               10.8 +/-    0.67      13.3 +/-    0.67  0.060 / 0.170
G09     188.9          70.0               10.9 +/-    0.65      11.6 +/-    0.65  0.110 / 0.250
G11     141.8          17.1               11.4 +/-    0.94      26.9 +/-    0.94  0.110 / 0.180
G23     156.7          36.3               10.6 +/-    1.21      16.5 +/-    1.21  0.040 / 0.050
G27     52.1           30.2                9.8 +/-    0.80      17.1 +/-    0.80  0.040 / 0.050
G28     239.3          28.7               12.6 +/-    2.10      22.8 +/-    2.10  0.060 / 0.090
G30     307.1          40.3               10.2 +/-    0.92      14.8 +/-    0.92  0.070 / 0.100